Compound for the manufacture of steel



UNITED STATES ATEENT reins.

EDW'ARD (DOYLE, OF ST. LOUIS, MISSOURI.

COMPOUND FOR THE MANUFACTURE OF STEEL.

SPECIFIOATfON forming part of Letters Patent No.288,979, dated November 2'7, 1883. Application filed June 15. 1883. (NJ sprci-rens To all whom it may concern.-

Be it known that I, ED\VARD COYLE, of St. Louis, Missouri, have made a new and useful Improvement in Compounds for the Menufwcture of Steel, of which the following is a full, clear, and enact description.

This improvement consists in a. mixture to he used in place of spiegeleisen in the converter or in the open-hearth process of making steel. I take of prussiate of potash, two pounds; of sal-ammouiae, two pounds; of ferro-manganese, one hundred pounds; of bluestone, one pound; of'eopperas, one pound; of rock-salt, two pounds.

The mixture composed of the above-named ingredients I apply to the iron in the converter as it is aboutto be converted into steel by the Bessemer process, or in the furnace as it is about to be converted into steel by the Siemens-Martin process that is, the mixture is applied in the same way and at the same time in and at which spiegeleisen is applied in the processes referred to, and for an analogous purpose. It is desirable to apply the mixture gradually.

I am aware that several of the ingredients herein named have been employed in the man ufaet-ure or steel in place of spiegeleisen; and therefore I claim- V In the manufacture of steel, a compound consisting of the following substances mixed together in about the proportions specified: prussiate of potash, sal-annnoniac. ferro-inangunese, blue-stone, oopperas, and rock-salt, substantially as described.

Witness my hand this 17th May, 1.883.

EDWARD COYLE.

Witnesses:

0. D. MOODY, FRANK. J. TAYLOR. 

